Possessive pronouns show ownership or possession and can be used before or alone. There are singular and plural possessive pronouns for the first, second, and third person points of view. When used before nouns, possessive pronouns act as adjectives modifying the noun. When used alone, they can act as subjects, objects, or predicate adjectives. Tips for using possessive pronouns correctly include not using apostrophes, avoiding contractions that look similar, and remembering that a possessive pronoun replaces a noun it possesses.